Inspecting The Small End - PIAGGIO MP3 500 i.e. SPORT Service Station Manual

MP3 500 i.e. SPORT Business_LT_ ABS-ASR_EU_USA (2015)
- Remove the 2 piston pin locking rings by the spe-
cific housings.
- Extract the pin and remove the piston.
N.B.
USE PAPER OR A CLOTH TO CLOSE THE CYLINDER
HOUSING MOUTH ON THE CRANKCASE TO PREVENT
SLIPPAGE OF ONE OF THE PIN LOCKING RINGS INTO
THE CASE.
- Remove the piston sealing rings and the oil scra-
per.
CAUTION
NOTE THE ASSEMBLY POSITIONS OF THE LININGS TO
PREVENT INVERTING THE POSITION IN CASE OF REUSE.
N.B.
BE CAREFUL NOT TO DAMAGE THE SEALING RINGS
DURING REMOVAL.

Inspecting the small end

- Measure the inside diameter of the connecting
rod small end using a bore meter.
N.B.
IF THE CONNECTING ROD SMALL END DIAMETER EX-
CEEDS THE STANDARD DIAMETER, SHOWS SIGNS OF
WEAR OR OVERHEATING, REPLACE THE CRANKSHAFT
AS DESCRIBED IN THE «CRANKCASE AND CRANK-
SHAFT» CHAPTER.
Characteristic
Standard diameter:
22 + 0.025 +0.015 mm
Inspecting the wrist pin
- Check the pin outside diameter using a micrometer.
Characteristic
Standard diameter:
22 0 -0.004 mm
Engine
ENG - 197